Have you ever seen what happens to polystyrene cups when you sink them to 4km below the surface of the sea? We gave friends and families a chance to find out!
Because of the hydrostatic pressure of water all around the cup, at such great depths the cup is squashed into a fraction of its original size! When the cup comes back up again, it doesn’t recover.. instead it remains miniature! As does anything that you draw or write on it!